MacMinis won't turn on

I've left it totally disconnected for days, reset the SMC following Apple's directions (listed at bottom of this post), and attempted to startup using a known-good* power-supply. Nothing, no light, no sound.

I'm responsible for a number of these Minis and have had this problem before, but they eventually responded to an SMC reset. I say eventually because it seems to take a few tries sometimes, which I've done.

Is there a hardware reset button inside? If not, anything else I can try?

*I turned off another same-model Mini which was on and tried that power supply, same outlet. The bizarre thing is that after that failed, now the one that was working has the same problem. It's as if this 'bad Mac' damaged the other unit's power supply, but that seems hard to believe.

Apple's SMC instructions:

1. Shut down the computer.

2. Unplug the computer's power cord.

3. Press and hold the power button for 5 seconds.

4. Release the power button.

5. Attach the computers power cable.

6. Press the power button to turn on the computer.

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+ Very puzzling problem. Please examine both power supplies and tell me what the wattage is on both. Thanks

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Thanks for the reply, Mayer, and sorry for my delay. Both are 110 watt. I have others of the same wattage but am hesitant to use them with these Minis.

BTW, I recall once reading - months ago on an Apple discussion board about Minis not powering on - of someone reporting a similar experience: I, and I think the other posters, didn't take the claim (of power supply damaged by Mini) seriously.

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